Elephants, humans, and bison are all k-selected species. ... These species often have short life expectancies, produce as many offspring as they can, and invest very low amounts of parental care. R-selected species can include mosquitos, mice, and bacteria.
What are examples of K and R selected species?
Typical examples of r-species are mice, rabbits, weeds and bacteria, which have a lot of offspring, but a short life expectancy. Examples of organisms undergoing K-selection are tortoises, elephants, people, and sequoia trees : their offspring are few but long-lived.
Which of the following are K selected traits?
- Slow development.
- Low reproductive rate.
- Late reproductive age.
- Large body size.
- Multiple reproductive cycles.
- Long lifespan.
- Strong competitive ability.
- Low offspring mortality.
Are Type 1 species k selected?
Because time, energy and resources are invested into child rearing, K -selected species tend to have a Type 1 and Type 2 survivorship curve. Offspring live longer lives and grow slowly until their habitat hits the carrying capacity.
Are fish K selected species?
K selected organisms produce few offspring but invest a lot of energy in them, and examples would include whales, primates (which includes humans), elephants, and some birds, like arctic terns. ... Most fish and rodents would be considered r selected .
What are K species?
K-selected species possess relatively stable populations fluctuating near the carrying capacity of the environment. These species are characterized by having only a few offspring but investing high amounts of parental care. Elephants, humans, and bison are all k-selected species.
Is Blue Whale K-selected species?
Large K selected tree such as the giant sequoia, red wood tree, large terrestrial mammals like elephants, rhinoceros and grizzlies, and large marine mammals such as blue whales and sperm whales are all competitively dominant species that run a substantial risk of extinction.
Why are elephants K selected species?
(a) Elephants are considered K-selected species as they live long, mature late, and provide long-term parental care to few offspring . Oak trees produce many offspring that do not receive parental care, but are considered K-selected species based on longevity and late maturation.
Which of the following is a typical K selected species adaptation?
Which of the following is a typical K-selected species’ adaptation? K-selected species have a low biotic potential but high survivorship in part because of extended care for their young.
Why are endangered species k selected?
Endangered species are likely to be K-selected species because they produce fewer offspring and breed less frequently . They also have a later reproductive age and a low population growth rate.
What does K selection mean?
K-selection: On the other extreme are species that are highly K-selected. K refers to the carrying capacity , and means that the babies are entering a competitive world, in a population at or near its carrying capacity. ... K-selected species produce offspring that each have a higher probability of survival to maturity.
Are kangaroos R-selected or K-selected?
While many of the “K” strategists tend to be large animals, and many of the “ r ” strategists smaller animals, there are notable exceptions among both. ... In Australian marsupials, the kangaroos and wallabies serve as an excellent example of how the environment can help shape an animal’s reproductive strategy.
Are K-selected species Type 1 or Type 3?
The Type III curve, characteristic... ... (K-selected species), usually have a Type I survivorship curve. This relatively flat curve reflects low juvenile mortality, with most individuals living to old age.
Are reptiles k-selected?
K-selected species expend high cost in reproduction for a low number of more difficult-to-produce offspring. ... short gestation, short parental care and a short time until the off spring can reproduce. Reptiles and turtles have both r and K while male humans have r and females have K.
Are Owls K-selected species?
It is clear from this research that the spotted owl is a K-selected species , meaning that natural selection has favored the evolution of long lifespans and low reproductive rates as mecha- nisms to mediate the negative effects of unpredictable environmental conditions (in terms of weather variability, disturbance ...
Are chickens k-selected?
Generally, the animals that are found acceptable by society to eat today are essentially K-strategists. These include meat coming from cows, swine, goat, chicken, among others.
What is meant by R-selected or K selected species?
r-selected species, also called r-strategist, species whose populations are governed by their biotic potential (maximum reproductive capacity, r). ... Wilson; K-selected species—that is, species whose population sizes fluctuate at or near their carrying capacity (K)—make up the second strategy.
Are gorillas K-selected species?
Examples of animals that pursue K strategies are gorillas and whales . The largest of the primates, gorillas require specialized diets (with distinct differences in the diets of mountain and lowland gorillas) and produce a single offspring once every three to four years.
Are K selected species opportunists?
R-selected or opportunistic species are species that have high growth rates, produce many offspring, and have low survival odds for those many offspring. These species typically have little parental care and reproduce often. ... Examples of k-selected species include mammals such as humans, dolphins, and rhinos .
Are pandas k selected?
As a K -selected and specialist species , pandas are neither resistant nor resilient to drastic changes in their habitat. Natural selection has resulted in the evolution of pandas with characteristics that help them to eat bamboo; if this major food source is eliminated, pandas cannot adapt quickly enough to survive.
Is Dandelion K-selected species?
Dandelions are particularly good examples of R-selected traits because they have several of the physical characteristics associated with R-selected traits including: rapid development, small size, and short lifespan.
Are snakes R or K-selected species?
Humans, elephants, non-human primates, horses, cows and the like are all K-selected species . ... Members of squamate (large lizards and snakes) and Cricetidae (a rodent family) tend to fall more towards the r-selected side of the scale, therefore, the number of offspring plays a large role in the population size.
Are oak trees K selected?
Oak trees produce many offspring that do not receive parental care, but are considered K-selected species based on longevity and late maturation .
Are grasshoppers K selected species?
Morabines grasshopper is an example of K-strategists. A Population of this species may contain only a few of individuals (low reproduction rate) but with the ability to survive in the environment by using mimicry/ camouflage on the plants where they are life (Matthews and Kitching, 1984).
Which of the following organism is K strategies?
Organisms whose life history is subject to K-selection are often referred to as K-strategists or K-selected. Organisms with K-selected traits include large organisms such as elephants, humans, and whales , but also smaller long-lived organisms such as Arctic terns, parrots and eagles.
Which of the following is K strategist?
Common examples of k-strategists species include humans, lions and whales .
What are five common characteristics of an endangered species k-selected species?
According to the IUCN, an endangered species is one that meets any one of the following criteria: a 50–70% population decrease over 10 years, a total geographic area less than 5,000 km 2 (or local population area less than 500 km 2 ) , a population size less than 2,500 adults, a restricted population of 250 adults, or a ...
What is K-selected species in biology?
K-selected species, also called K-strategist, species whose populations fluctuate at or near the carrying capacity (K) of the environment in which they reside . ... K-selected species are characterized by long gestation periods lasting several months, slow maturation (and thus extended parental care), and long life spans.
What is a Type 3 organism?
The Type III curve, characteristic of small mammals, fishes, and invertebrates, is the opposite: it describes organisms with a high death rate (or low survivorship rate) immediately following birth .
Which of the following is generally true of K strategist species compared to R strategist species?
Which of the following is generally true of K-strategist species as compared to r-strategist species? They have longer life spans.
Are most invasive species k-selected or R selected species?
Biologists characterize most invasive species as r-selected . ... While K-selected species exhibit low mortality, the majority of an r-selected species’ offspring are sure to perish; however, a few are likely to navigate the world successfully, mature and reproduce.
What animals have a Type 3 survivorship curve?
Trees, marine invertebrates, and most fish have a Type III survivorship curve. In a Type III curve, very few organisms survive their younger years.
What does K selection refer to quizlet?
“k” conceptually refers to the carrying capacity of the logistic growth equation. What is k-selection defined as? Selection that favors a more effective utilization of resources .
Are K-selected species density dependent?
Whereas density-independent factors limit r-selected species in unpredictable environments, K-selected species are adapted to stable environments and regulated by density-dependent factors .
Are sea lions K-selected species?
We therefore don’t have a long time-series of data showing the kinds of population fluctua tions that have occurred in the past. However, we do know that marine mammals are long-lived, slow growing , and produce few young, which are traits characteristic of what biologists call K-selected species.
